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A sandblasting apparatus includes a chamber defining a cavity, a support assembly received in the cavity, a first and a second sandblasting assemblies. The support assembly includes a number of pairs of elongated support plates for holding a plate-shaped workpiece therebetween. The support plates ar

A sandblasting apparatus includes a chamber defining a cavity, a support assembly received in the cavity, a first and a second sandblasting assemblies. The support assembly includes a number of pairs of elongated support plates for holding a plate-shaped workpiece therebetween. The support plates are moveable along a vertical direction and a first horizontal direction. The first sandblasting assembly is configured for spraying sand downwardly toward the plate-shaped workpiece so as to cut the plate-shaped workpiece into a number of workpiece strips. The second sandblasting assembly is configured for spraying sand toward the workpiece strips along a second horizontal direction perpendicular to the first horizontal direction so as to cut the workpiece strips into workpiece blocks. The support plates are configured to rotate the workpiece blocks, and the second sandblasting assembly is further configured for processing the workpiece blocks into cylindrical workpieces while the support plates rotate the workpiece blocks.

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1. A sandblasting apparatus, comprising: a chamber defining a cavity;a support assembly received in the cavity, the support assembly comprising a plurality of pairs of elongated support plates for holding a plate-shaped workpiece therebetween, the support plates being moveable along a vertical direc

1. A sandblasting apparatus, comprising: a chamber defining a cavity;a support assembly received in the cavity, the support assembly comprising a plurality of pairs of elongated support plates for holding a plate-shaped workpiece therebetween, the support plates being moveable along a vertical direction and a first horizontal direction;a first sandblasting assembly configured for spraying sand downwardly toward the plate-shaped workpiece so as to cut the plate-shaped workpiece into a plurality of workpiece strips;a second sandblasting assembly configured for spraying sand toward the workpiece strips along a second horizontal direction perpendicular to the first horizontal direction so as to cut the workpiece strips into workpiece blocks; wherein the support plates are configured to rotate the workpiece blocks, and the second sandblasting assembly is further configured for processing the workpiece blocks into cylindrical workpieces while the support plates rotate the workpiece blocks. 2. The sandblasting apparatus as claimed in claim 1, wherein the first sandblasting assembly is configured for spraying the sand along the vertical direction. 3. The sandblasting apparatus as claimed in claim 2, wherein the support plates are parallel to each other. 4. The sandblasting apparatus as claimed in claim 3, wherein the support assembly further comprises a vertical supporting pole, two hanging arms, and a pair of moveable arms, the hanging arms are moveably connected to the supporting pole and apart from each other, the moveable arms are moveably connected to the hanging arms respectively, the moveable arms are oriented in the second horizontal direction, each pair of the support plates is fixedly connected to the moveable arms, and each pair of the support plates are vertically aligned with each other. 5. The sandblasting apparatus as claimed in claim 4, wherein each support plate comprises a body portion and a plurality of rotatable members on a same side of the body portion, the rotatable members of each pair of support plates are paired and vertically aligned, and the paired rotatable members are configured for clamping the workpiece blocks therebetween. 6. The sandblasting apparatus as claimed in claim 5, wherein the second sandblasting assembly comprises a plurality of spray nozzles arranged in a line along the first horizontal direction, and the spray nozzles are misaligned with the rotatable members in the second horizontal direction. 7. The sandblasting apparatus as claimed in claim 4, wherein the support assembly further comprises a plurality of driving members, the support plate comprises a body portion and a plurality of rotatable members corresponding to the driving members, the rotatable members and the driving members are positioned at opposite sides of the body portion, and the driving members are configured for driving the corresponding rotatable members to rotate. 8. The sandblasting apparatus as claimed in claim 4, further comprising a grinding assembly, wherein the grinding assembly comprises a plurality of rotatable rollers and a plurality of wheels mounted on the rotatable rollers, and the wheels are misaligned with the support plates along the first horizontal direction. 9. The sandblasting apparatus as claimed in claim 8, wherein the grinding assembly is moveable along the first horizontal direction in the cavity. 10. The sandblasting apparatus as claimed in claim 4, further comprising an airflow-guiding assembly, wherein the airflow-guiding assembly is configured for blowing air toward the support plates. 11. The sandblasting apparatus as claimed in claim 10, wherein the chamber comprises an upper wall, a lower wall opposite to the upper wall, a front wall, and a back wall opposite to the front wall, the front wall and the back wall are interconnected between the upper wall and the lower wall, the supporting pole is interconnected between the upper wall and the lower wall, a longitudinal direction of the supporting pole is defined as the vertical direction, one end of each of the hanging arms is moveably and perpendicularly connected to the supporting pole, the other end of each of the hanging arms is free, a longitudinal direction of each of the hanging arms is defined as the first horizontal direction, one end of each of the moveable arms is moveably and perpendicularly connected to the corresponding hanging arm, the other end of each of the moveable arms is free, and a longitudinal direction of each of the moveable arms is defined as the second horizontal direction. 12. The sandblasting apparatus as claimed in claim 11, wherein the first sandblasting assembly is positioned on the upper wall, the second sandblasting assembly is positioned on the back wall, and the airflow-guiding assembly is positioned on the upper wall and spaced apart from the first sandblasting assembly. 13. The sandblasting apparatus as claimed in claim 12, wherein a door is attached to the front wall and is configured for sealing or unsealing the cavity. 14. A sandblasting apparatus, comprising: a chamber defining a cavity;a support assembly received in the cavity, the support assembly comprising a plurality of pairs of elongated support plates for holding a plate-shaped workpiece therebetween, the support plates being moveable along a vertical direction and a first horizontal direction, each support plate comprising a body portion and a plurality of rotatable members on a same side of the body portion, the rotatable members of each pair of support plates being paired and vertically aligned;a first sandblasting assembly configured for spraying sand downwardly toward the plate-shaped workpiece so as to cut the plate-shaped workpiece into a plurality of workpiece strips;a second sandblasting assembly configured for spraying sand toward the workpiece strips along a second horizontal direction perpendicular to the first horizontal direction so as to cut the workpiece strips into workpiece blocks; wherein the paired rotatable members are configured to clamp and rotate the workpiece blocks, and the second sandblasting assembly is further configured for processing the workpiece blocks into cylindrical workpieces while the rotatable members rotate the workpiece blocks. 15. The sandblasting apparatus as claimed in claim 14, wherein the first sandblasting assembly is configured for spraying the sand along the vertical direction. 16. The sandblasting apparatus as claimed in claim 15, wherein the support plates are parallel to each other. 17. The sandblasting apparatus as claimed in claim 14, wherein the second sandblasting assembly comprises a plurality of spray nozzles arranged in a line along the first horizontal direction, and the spray nozzles are misaligned with the rotatable members in the second horizontal direction. 18. The sandblasting apparatus as claimed in claim 17, further comprising a grinding assembly, wherein the grinding assembly comprises a plurality of rotatable rollers and a plurality of wheels mounted on the rotatable rollers, and the wheels are misaligned with the support plates along the first horizontal direction. 19. The sandblasting apparatus as claimed in claim 18, wherein the grinding assembly is moveable along the first horizontal direction in the cavity. 20. The sandblasting apparatus as claimed in claim 19, further comprising an airflow-guiding assembly, wherein the airflow-guiding assembly is configured for blowing air toward the support plates.